> If they are enabled and the person logged in is on a regular account (not admin or power user of sorts) then the base installation of web clients must check for an RTA header [1].

Your cite is an earlier post of yours which says

> The one and only method I will participate in is server operators setting a RTA header [1]

and that cites a still earlier post of yours

> I stand by my repeated statements of how this could have been solved simply using an RTA header [1]

which finally actually cites¹ something that explains what the heck on RTA header is.

It would be quite a bit more reader friendly to cite https://www.rtalabel.org/page.php rather than make the reader traverse a linked list of comments to get there.

¹https://www.rtalabel.org/page.php